/*
 * Copyright (C) 2007-2012 by XDEV Software, All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 3.0 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 
package xdev.db.sql;


import xdev.vt.VirtualTableColumn;
import net.jadoth.sqlengine.internal.SqlColumn;


/**
 * This class represents a column expression in the SQL API.
 * <p>
 * It can be constructed with a name only or an optional {@link Table} as
 * prefix.
 * 
 * @see VirtualTableColumn
 * 
 * @author XDEV Software
 * 
 */
public class Column extends Expression
{
	/**
	 * Creates a new column object with a name only.
	 * 
	 * @param name
	 *            the name of the column
	 */
	public Column(String name)
	{
		this(new SqlColumn(name));
	}
	
	
	/**
	 * Creates a new column object with a table and a name
	 * 
	 * @param table
	 *            the prefix of the column
	 * @param name
	 *            the name of the column
	 */
	public Column(Table table, String name)
	{
		this(new SqlColumn(table.delegate(),name));
	}
	
	
	Column(SqlColumn delegate)
	{
		super(delegate);
	}
	
	
	protected void _updateDelegate(String name)
	{
		delegate = new SqlColumn(name);
	}
	
	
	protected void _updateDelegate(Table table, String name)
	{
		delegate = new SqlColumn(table.delegate(),name);
	}
}
